cesar-urteaga/avr-libc3

A Fork of AVR-LIBC V2.0 from https://www.nongnu.org/avr-libc/

AVR-LIBC3

About

This is a FORK of the standard library for Atmel AVR devices together with the AVR-GCC compiler. The original and its SVN repository can be found here: https://www.nongnu.org/avr-libc/

The fork was created on the 17th of July 2019 with the intention of applying long standing patches and correcting any long standing bug/deficiencies.

Changes since forking

Merged Upstream Patch #9543

Adds support for:

• attiny202, attiny204, attiny212, attiny214
• attiny402, attiny404, attiny406, attiny412, attiny414, attiny416, attiny417
• attiny804, attiny806, attiny807, attiny814, attiny816, attiny817
• attiny1604, attiny1606, attiny1607, attiny1614, attiny1616, 1617
• attiny3214, attiny3216, attiny3217

Merged Upstream Patch #9553

This patch fixes some build warnings and a potential wrong-code issues in GETBYTE as used by vfprintf and vfscanf

Merged Upstream Patch 9594

Add missing TXD0/TXD1/RXD0/RXD1 pins for the ATmega324PA

Merged Upstream Patch 9405

This adds new ISR_NOGCISR macro to be used as ISR attribute with a similar naming like the already existing ones. For the feature, see

https://gcc.gnu.org/onlinedocs/gcc/AVR-Function-Attributes.html

Merged Upstream Patch 9416

AVR_TINY specific implementation of _delay_loop_2

Merged Upstream Patch 9437

Some attiny chips use the RSIG bit instead of SIGRD to read from the signature imprint area. From a quick grep, this concerns: tn1634, tn4313, tn441, tn828, tn841, tn24, tn44, tn84, tn25, tn45, tn85. This changes was tested on a tn841 only, where no other changes are needed than using another name for this bit.